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Finding the Fourth Proportional to 619,105.64, 928,702.60 and 214,129.94

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Solution

The fourth proportional to 619,105.64, 928,702.60 and 214,129.94 is: 321,210.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,105.64 : 928,702.60 = 214,129.94 : x
  2. Step 2: Convert to fraction form
    619,105.64/928,702.60 = 214,129.94/x
  3. Step 3: Cross multiply
    619,105.64x = 928,702.60 × 214,129.94
  4. Step 4: Simplify right side
    619,105.64x = 198,863,032,015.84
  5. Step 5: Solve for x
    x = 198,863,032,015.84/619,105.64
  6. Step 6: Final answer
    x = 321,210.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.